[1] Tsinghua Univ, Dept Engn Phys, Key Lab Particle & Radiat Imaging, Minist Educ, Beijing 100084, Peoples R China
[2] Peoples Liberat Army Gen Hosp, Dept Adult Cardiac Surg, Sr Dept Cardiol, Med Ctr 6, Fucheng Rd, Beijing 100048, Peoples R China
[3] Chinese PLA Med Sch, Fuxing Rd, Beijing 100089, Peoples R China